


HTML5 DeviceOrientation implements mobile website shake function code example_html5 tutorial skills
Make two statements before the introduction:
The following code can be run directly. Of course, don’t forget to quote jQuery.
<script><br />// DeviceOrientation provides high-level encapsulation of the underlying direction sensor and motion sensor, providing support for DOM events. <br />// This feature includes two events: <br />// 1. deviceOrientation: an event that encapsulates the orientation sensor data, which can obtain the orientation data of the mobile phone when it is stationary (the angle, orientation and orientation of the mobile phone, etc.) . <br />// 2. deviceMotion: Encapsulates the events of the motion sensor and can obtain data such as motion acceleration when the mobile phone is in motion. <br />// Using these two events, you can easily implement interesting functions such as gravity sensing and compass. <p>// Now there is a very common and fashionable function in many Native applications - shake to find people, shake to read news, shake to find gold coins. . . <br />// Maybe you already know this function very well on the android or ios client, but now, I will tell you how to implement the shake function on the mobile web page. <p>// OK, let’s start now, hehe~<br />// Let’s first understand the device motion events——DeviceMotionEvent: Returns the relevant information about acceleration and rotation of the device, where the acceleration data includes The following three directions: <br />// x: horizontally across the phone screen; <br />// y: vertically across the phone screen; <br />// z: vertically across the phone screen. <br />// In view of the fact that some devices do not exclude the influence of gravity, this event will return two attributes: <br />// 1. accelerationIncludingGravity (acceleration including gravity) <br />// 2. acceleration (excluding the influence of gravity) Acceleration) <p>// As a coder, the most direct way is to code. Come on and start coding! <p>//First, listen for motion sensing events on the page<br />function init(){<br /> if (window.DeviceMotionEvent) {<br /> // Mobile browsers support motion sensing events<br /> window.addEventListener('devicemotion', deviceMotionHandler, false);<br /> $("#yaoyiyaoyes").show();<br /> } else{<br /> // Mobile browsers do not support motion sensing events<br /> $("#yaoyiyaono").show();<br /> } <br />} <p>// So, how do we calculate whether the user is shaking the phone? You can consider the following points: <br />// 1. In fact, when users shake their phones, they always shake in one direction; <br />// 2. When users shake their phones, they move in x, There will be corresponding changes in the speed in the three directions of y and z; <br />// 3. The user’s normal mobile phone movement behavior cannot be regarded as shaking (the phone is placed in the pocket, and the acceleration will also change when walking) ). <br />// Considering the above three points, calculate the acceleration in the three directions, measure them at intervals, examine their rate of change in a fixed period of time, and determine a threshold to trigger the operation after shaking. . <p>// First, define a shaking threshold <br />var SHAKE_THRESHOLD = 3000;<br />// Define a variable to save the time of the last update <br />var last_update = 0;<br />// Tight Then define x, y, z to record the data of the three axes and the time of the last departure <br />var x;<br />var y;<br />var z;<br />var last_x;<br />var last_y;<br />var last_z; <p>//In order to make this example a little more boring and interesting, add a counter <br />var count = 0; <p>function deviceMotionHandler(eventData) {<br /> // Get acceleration including gravity <br /> var acceleration = eventData.accelerationIncludingGravity; <p> // Get the current time <br /> var curTime = new Date().getTime(); <br /> var diffTime = curTime -last_update;<br /> // Fixed time period <br /> if (diffTime > 100) {<br /> last_update = curTime; <p> x = acceleration.x; <br /> y = acceleration.y; <br /> z = acceleration.z; <p> var speed = Math.abs(x y z - last_x - last_y - last_z) / diffTime * 10000; <p> if (speed > SHAKE_THRESHOLD) { <br /> // TODO: Here you can implement the data logic operations to be performed after shaking <br /> Count ;<br /> $("#yaoyiyaoyes"). hide ();<br /> } <p> last_x = x; <br /> last_y = y; <br /> last_z = z; ="font-size:20px;margin:10px;line-height:35px;display:none;"><br />Brother, if you see me, it means you can't shake it yet, but it doesn't mean you are not qualified to use me. , instead: <br />1. If you are using a PC browser, that is wrong. I only like mobile browsers; <br /> 2. If you are using an Android phone, I am sorry to tell you that Android comes with The browser abandoned me, you can use third-party browsers such as UCWeb and chrome; <br /> 3. If you do not fall into the above two situations, then I can only tell you: you need to change your mobile phone! ! ! <br /></script>
<script><br />$(document).ready(function(){<br />init();<br />});<br /></script>

H5 improves web user experience with multimedia support, offline storage and performance optimization. 1) Multimedia support: H5 and elements simplify development and improve user experience. 2) Offline storage: WebStorage and IndexedDB allow offline use to improve the experience. 3) Performance optimization: WebWorkers and elements optimize performance to reduce bandwidth consumption.

HTML5 code consists of tags, elements and attributes: 1. The tag defines the content type and is surrounded by angle brackets, such as. 2. Elements are composed of start tags, contents and end tags, such as contents. 3. Attributes define key-value pairs in the start tag, enhance functions, such as. These are the basic units for building web structure.

HTML5 is a key technology for building modern web pages, providing many new elements and features. 1. HTML5 introduces semantic elements such as, , etc., which enhances web page structure and SEO. 2. Support multimedia elements and embed media without plug-ins. 3. Forms enhance new input types and verification properties, simplifying the verification process. 4. Offer offline and local storage functions to improve web page performance and user experience.

Best practices for H5 code include: 1. Use correct DOCTYPE declarations and character encoding; 2. Use semantic tags; 3. Reduce HTTP requests; 4. Use asynchronous loading; 5. Optimize images. These practices can improve the efficiency, maintainability and user experience of web pages.

Web standards and technologies have evolved from HTML4, CSS2 and simple JavaScript to date and have undergone significant developments. 1) HTML5 introduces APIs such as Canvas and WebStorage, which enhances the complexity and interactivity of web applications. 2) CSS3 adds animation and transition functions to make the page more effective. 3) JavaScript improves development efficiency and code readability through modern syntax of Node.js and ES6, such as arrow functions and classes. These changes have promoted the development of performance optimization and best practices of web applications.

H5 is not just the abbreviation of HTML5, it represents a wider modern web development technology ecosystem: 1. H5 includes HTML5, CSS3, JavaScript and related APIs and technologies; 2. It provides a richer, interactive and smooth user experience, and can run seamlessly on multiple devices; 3. Using the H5 technology stack, you can create responsive web pages and complex interactive functions.

H5 and HTML5 refer to the same thing, namely HTML5. HTML5 is the fifth version of HTML, bringing new features such as semantic tags, multimedia support, canvas and graphics, offline storage and local storage, improving the expressiveness and interactivity of web pages.

H5referstoHTML5,apivotaltechnologyinwebdevelopment.1)HTML5introducesnewelementsandAPIsforrich,dynamicwebapplications.2)Itsupportsmultimediawithoutplugins,enhancinguserexperienceacrossdevices.3)SemanticelementsimprovecontentstructureandSEO.4)H5'srespo


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SublimeText3 Chinese version
Chinese version, very easy to use

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

SublimeText3 Mac version
God-level code editing software (SublimeText3)